A 24-day voyage across the coast of Queensland, Australia, revealed the hidden lives of indigenous people that once occupied an ancient landscape found frozen in time.

A team of scientists and Aboriginal rangers have uncovered a submerged landscape beneath Australia’s Great Barrier Reef, mapping rivers, lakes, estuaries, and beaches in great detail. The hidden coastal plain was where First Nations people once lived before sea levels rose around 7,000 years ago, submerged the area beneath the waters.

“First Nations people arrived in Australia over 65,000 years ago when sea levels were 80 meters below present day,” Helen Bostock, a researcher at…

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